ETC P89LPC931

P89LPC930/931
8-bit microcontrollers with two-clock 80C51 core
4 kB/8 kB 3 V Flash with 256-byte data RAM
Rev. 03 — 06 October 2003
Product data
1. General description
The P89LPC930/931 is a single-chip microcontroller designed for applications
demanding high-integration, low cost solutions over a wide range of performance
requirements. The P89LPC930/931 is based on a high performance processor
architecture that executes instructions in two to four clocks, six times the rate of
standard 80C51 devices. Many system-level functions have been incorporated into
the P89LPC930/931 in order to reduce component count, board space, and system
cost.
2. Features
■ A high performance 80C51 CPU provides instruction cycle times of 167-333 ns for
all instructions except multiply and divide when executing at 12 MHz. This is
6 times the performance of the standard 80C51 running at the same clock
frequency. A lower clock frequency for the same performance results in power
savings and reduced EMI.
■ 2.4 V to 3.6 V VDD operating range. I/O pins are 5 V tolerant (may be pulled up or
driven to 5.5 V).
■ 4 kB/8 kB Flash code memory with 1 kB sectors, and 64-byte page size.
■ Byte-erase allowing code memory to be used for data storage.
■ Flash program operation completes in 2 ms.
■ Flash erase operation completes in 2 ms.
■ 256-byte RAM data memory.
■ Two 16-bit counter/timers. Each timer may be configured to toggle a port output
upon timer overflow or to become a PWM output.
■ Real-Time clock that can also be used as a system timer.
■ Two analog comparators with selectable inputs and reference source.
■ Enhanced UART with fractional baud rate generator, break detect, framing error
detection, automatic address detection and versatile interrupt capabilities.
■ 400 kHz byte-wide I2C-bus communication port.
■ SPI communication port.
■ Eight keypad interrupt inputs, plus two additional external interrupt inputs.
■ Four interrupt priority levels.
■ Watchdog timer with separate on-chip oscillator, requiring no external
components. The Watchdog time-out time is selectable from 8 values.
■ Active-LOW reset. On-chip power-on reset allows operation without external reset
components. A reset counter and reset glitch suppression circuitry prevent
spurious and incomplete resets. A software reset function is also available.
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
■ Low voltage reset (Brownout detect) allows a graceful system shutdown when
power fails. May optionally be configured as an interrupt.
■ Oscillator Fail Detect. The Watchdog timer has a separate fully on-chip oscillator
allowing it to perform an oscillator fail detect function.
■ Configurable on-chip oscillator with frequency range and RC oscillator options
(selected by user programmed Flash configuration bits). The RC oscillator option
allows operation without external oscillator components. Oscillator options
support frequencies from 20 kHz to the maximum operating frequency of 12 MHz.
The RC oscillator option is selectable and fine tunable.
■ Programmable port output configuration options:
◆ Quasi-bidirectional
◆ Open drain
◆ Push-pull
◆ Input-only
■ Port ‘input pattern match’ detect. Port 0 may generate an interrupt when the value
of the pins match or do not match a programmable pattern.
■ Second data pointer.
■ Schmitt trigger port inputs.
■ LED drive capability (20 mA) on all port pins. Maximum combined I/O current of
100 mA.
■ Controlled slew rate port outputs to reduce EMI. Outputs have approximately
10 ns minimum ramp times.
■ 23 I/O pins minimum (28-pin package). Up to 26 I/O pins while using on-chip
oscillator and reset options.
■ Only power and ground connections are required to operate the P89LPC930/931
using on-chip oscillator and on-chip reset options.
■ Serial Flash programming allows in-circuit production coding. Flash security bits
prevent reading of sensitive programs.
■ In-Application Programming of the Flash code memory. This allows changing the
code in a running application.
■ Idle and two different Power-down reduced power modes. Improved wake-up from
Power-down mode (a low interrupt input starts execution). Typical Power-down
current is 1 µA (total Power-down with voltage comparators disabled).
■ 28-pin TSSOP package.
■ Emulation support.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
2 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
3. Ordering information
Table 1:
Ordering information
Type number
Package
Name
Description
Version
P89LPC930FDH
TSSOP28
plastic thin shrink small outline package;
28 leads; body width 4.4 mm
SOT361-1
P89LPC931FDH
TSSOP28
plastic thin shrink small outline package;
28 leads; body width 4.4 mm
SOT361-1
3.1 Ordering options
Table 2:
Part options
Type number
Program memory
Temperature range
Frequency
P89LPC930FDH
4 kB
−45 °C to +85 °C
0 to 12 MHz
P89LPC931FDH
8 kB
−45 °C to +85 °C
0 to 12 MHz
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
3 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
4. Block diagram
HIGH PERFORMANCE
ACCELERATED 2-CLOCK 80C51 CPU
4 kB/8 kB
CODE FLASH
UART
INTERNAL BUS
256-BYTE
DATA RAM
I2C
PORT 3
CONFIGURABLE I/Os
SPI
PORT 2
CONFIGURABLE I/Os
REAL-TIME CLOCK/
SYSTEM TIMER
PORT 1
CONFIGURABLE I/Os
TIMER 0
TIMER 1
PORT 0
CONFIGURABLE I/Os
WATCHDOG TIMER
AND OSCILLATOR
KEYPAD
INTERRUPT
ANALOG
COMPARATORS
PROGRAMMABLE
OSCILLATOR DIVIDER
CRYSTAL
OR
RESONATOR
CONFIGURABLE
OSCILLATOR
CPU
CLOCK
ON-CHIP
RC
OSCILLATOR
POWER MONITOR
(POWER-ON RESET,
BROWNOUT RESET)
002aaa428
Fig 1. Block diagram.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
4 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
5. Pinning information
5.1 Pinning
handbook, halfpage
1
28 P2.7
P2.1
2
27 P2.6
KBIO/CMP2/P0.0
3
26 P0.1/CIN2B/KBI1
P1.7
4
25 P0.2/CIN2A/KBI2
P1.6
5
24 P0.3/CIN1B/KBI3
RST/P1.5
6
VSS
7
XTAL1/P3.1
8
CLKOUT/XTAL2/P3.0
9
P89LPC930FDH
P89LPC931FDH
P2.0
INT1/P1.4 10
23 P0.4/CIN1A/KBI4
22 P0.5/CMPREF/KBI5
21 VDD
20 P0.6/CMP1/KBI6
19 P0.7/T1/KBI7
SDA/INT0/P1.3 11
18 P1.0/TXD
SCL/T0/P1.2 12
17 P1.1/RXD
16 P2.5/SPICLK
MOSI/P2.2 13
15 P2.4/SS
MISO/P2.3 14
002aaa429
Fig 2. DIP28 pin configuration.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
5 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
5.2 Pin description
Table 3:
Pin description
Symbol
Pin
Type
P0.0 - P0.7
3, 26, 25, I/O
24, 23, 22,
20, 19
Description
Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 0 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to Section
8.11.1 “Port configurations” and Table 7 “DC electrical characteristics” for details.
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt triggered inputs.
Port 0 also provides various special functions as described below:
3
26
25
24
23
22
20
19
I/O
P0.0 — Port 0 bit 0.
O
CMP2 — Comparator 2 output.
I
KBI0 — Keyboard input 0.
I/O
P0.1 — Port 0 bit 1.
I
CIN2B — Comparator 2 positive input B.
I
KBI1 — Keyboard input 1.
I/O
P0.2 — Port 0 bit 2.
I
CIN2A — Comparator 2 positive input A.
I
KBI2 — Keyboard input 2.
I/O
P0.3 — Port 0 bit 3.
I
CIN1B — Comparator 1 positive input B.
I
KBI3 — Keyboard input 3.
I/O
P0.4 — Port 0 bit 4.
I
CIN1A — Comparator 1 positive input A.
I
KBI4 — Keyboard input 4.
I/O
P0.5 — Port 0 bit 5.
I
CMPREF — Comparator reference (negative) input.
I
KBI5 — Keyboard input 5.
I/O
P0.6 — Port 0 bit 6.
O
CMP1 — Comparator 1 output.
I
KBI6 — Keyboard input 6.
I/O
P0.7 — Port 0 bit 7.
I/O
T1 — Timer/counter 1 external count input or overflow output.
I
KBI7 — Keyboard input 7.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
6 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
Table 3:
Pin description…continued
Symbol
Pin
P1.0 - P1.7
18, 17, 12, I/O, I [1] Port 1: Port 1 is an 8-bit I/O port with a user-configurable output type, except for
11, 10, 6,
three pins as noted below. During reset Port 1 latches are configured in the input only
5, 4
mode with the internal pull-up disabled. The operation of the configurable Port 1 pins
as inputs and outputs depends upon the port configuration selected. Each of the
configurable port pins are programmed independently. Refer to Section 8.11.1 “Port
configurations” and Table 7 “DC electrical characteristics” for details. P1.2 - P1.3 are
open drain when used as outputs. P1.5 is input only.
Type
Description
All pins have Schmitt triggered inputs.
Port 1 also provides various special functions as described below:
18
17
12
11
10
6
I/O
P1.0 — Port 1 bit 0.
O
TxD — Transmitter output for the serial port.
I/O
P1.1 — Port 1 bit 1.
I
RXD — Receiver input for the serial port.
I/O
P1.2 — Port 1 bit 2 (open-drain when used as output).
I/O
T0 — Timer/counter 0 external count input or overflow output (open-drain when used
as output).
I/O
SCL — I2C serial clock input/output.
I
P1.3 — Port 1 bit 3 (open-drain when used as output).
I
INT0 — External interrupt 0 input.
I/O
SDA — I2C serial data input/output.
I
P1.4 — Port 1 bit 4.
I
INT1 — External interrupt 1 input.
I
P1.5 — Port 1 bit 5 (input only).
I
RST — External Reset input during Power-on or if selected via UCFG1. When
functioning as a reset input a LOW on this pin resets the microcontroller, causing I/O
ports and peripherals to take on their default states, and the processor begins
execution at address 0. Also used during a power-on sequence to force In-System
Programming mode.
5
I/O
P1.6 — Port 1 bit 6.
4
I/O
P1.7 — Port 1 bit 7.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
7 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
Table 3:
Pin description…continued
Symbol
Pin
P2.0 - P2.7
1, 2, 13,
I/O
14, 15, 16,
27, 28
Type
Description
Port 2: Port 2 is a 8-bit I/O port with a user-configurable output type. During reset
Port 2 latches are configured in the input only mode with the internal pull-up disabled.
The operation of port 2 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to the
section on I/O port configuration and the DC Electrical Characteristics for details.
This port is not available in 20-pin package and is configured automatically as
outputs to conserve power. The alternate functions for these pins must not be
enabled.
All pins have Schmitt triggered inputs.
Port 2 also provides various special functions as described below.
1
I/O
P2.0 — Port 2 bit 0.
2
I/O
P2.1 — Port 2 bit 1.
13
I/O
P2.2 — Port 2 bit 2.
I/O
MOSI — SPI master out slave in. When configured as master, this pin is output,
when configured as slave, this pin is input.
I/O
P2.3 — Port 2 bit 3.
I/O
MISO — SPI master in slave out. When configured as master, this pin is input, when
configured as slave, this pin is output.
I/O
P2.4 — Port 2 bit 4.
I
SS — SPI Slave select.
I/O
P2.5 — Port 2 bit 5.
I/O
SPICLK — SPI clock. When configured as master, this pin is output, when
configured as slave, this pin is input.
14
15
16
27
I/O
P2.6 — Port 2 bit 6.
28
I/O
P2.7 — Port 2 bit 7.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
8 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
Table 3:
Pin description…continued
Symbol
Pin
Type
Description
P3.0 - P3.1
9, 8
I/O
Port 3: Port 3 is an 2-bit I/O port with a user-configurable output type. During reset
Port 3 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 3 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to Section
8.11.1 “Port configurations” and Table 7 “DC electrical characteristics” for details.
All pins have Schmitt triggered inputs.
Port 3 also provides various special functions as described below:
9
8
I/O
P3.0 — Port 3 bit 0.
O
XTAL2 — Output from the oscillator amplifier (when a crystal oscillator option is
selected via the FLASH configuration).
O
CLKOUT — CPU clock divided by 2 when enabled via SFR bit (ENCLK - TRIM.6). It
can be used if the CPU clock is the internal RC oscillator, Watchdog oscillator or
external clock input, except when XTAL1/XTAL2 are used to generate clock source
for the real time clock/system timer.
I/O
P3.1 — Port 3 bit 1.
I
XTAL1 — Input to the oscillator circuit and internal clock generator circuits (when
selected via the FLASH configuration). It can be a port pin if internal RC oscillator or
Watchdog oscillator is used as the CPU clock source, and if XTAL1/XTAL2 are not
used to generate the clock for the real time clock/system timer.
VSS
7
I
Ground: 0 V reference.
VDD
21
I
Power Supply: This is the power supply voltage for normal operation as well as Idle
and Power Down modes.
[1]
Input/Output for P1.0-P1.4, P1.6, P1.7. Input for P1.5.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
9 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
6. Logic symbol
XTAL1
PORT 2
XTAL2
P89LPC930/931
CLKOUT
PORT 0
CMP2
CIN2B
CIN2A
CIN1B
CIN1A
CMPREF
CMP1
T1
PORT 3
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
VSS
PORT 1
VDD
TxD
RxD
T0
INT0
INT1
RST
SCL
SDA
MOSI
MISO
SS
SPICLK
002aaa427
Fig 3. Logic symbol.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
10 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
7. Special function registers
Remark: Special Function Registers (SFRs) accesses are restricted in the following
ways:
• User must not attempt to access any SFR locations not defined.
• Accesses to any defined SFR locations must be strictly for the functions for the
SFRs.
• SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows:
– ‘-’ Unless otherwise specified, must be written with ‘0’, but can return any value
when read (even if it was written with ‘0’). It is a reserved bit and may be used in
future derivatives.
– ‘0’ must be written with ‘0’, and will return a ‘0’ when read.
– ‘1’ must be written with ‘1’, and will return a ‘1’ when read.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
11 of 54
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Philips Semiconductors
9397 750 12122
Product data
Table 4:
Special function registers
* indicates SFRs that are bit addressable.
Name
Description
SFR Bit functions and addresses
addr.
MSB
Bit address
ACC*
Accumulator
E0H
AUXR1
Auxiliary function register
A2H
Bit address
E7
E6
E5
Reset value
LSB
E4
E3
E2
E1
Hex
Binary
00
00000000
00[1]
000000x0
E0
CLKLP
EBRR
ENT1
ENT0
SRST
0
-
DPS
F7
F6
F5
F4
F3
F2
F1
F0
B register
F0H
00
00000000
BRGR0[2]
Baud rate generator rate
LOW
BEH
00
00000000
BRGR1[2]
Baud rate generator rate
HIGH
BFH
00
00000000
BRGCON
Baud rate generator control
BDH
BRGEN
00[6]
xxxxxx00
xx000000
-
-
-
-
-
-
SBRGS
CMP1
Comparator 1 control register
ACH
-
-
CE1
CP1
CN1
OE1
CO1
CMF1
00[1]
CMP2
Comparator 2 control register
ADH
-
-
CE2
CP2
CN2
OE2
CO2
CMF2
00[1]
xx000000
DIVM
CPU clock divide-by-M
control
95H
00
00000000
DPTR
Data pointer (2 bytes)
Data pointer HIGH
83H
00
00000000
DPL
Data pointer LOW
82H
00
00000000
I2ADR
I2C
DBH
00
00000000
I2CON*
I2C
00
x00000x0
I2DAT
I2C data register
DAH
I2SCLH
Serial clock generator/SCL
duty cycle register HIGH
DDH
00
00000000
I2SCLL
Serial clock generator/SCL
duty cycle register LOW
DCH
00
00000000
I2STAT
I2C status register
D9H
F8
11111000
00
00000000
slave address register
Bit address
control register
D8H
12 of 54
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Bit address
IEN0*
Interrupt enable 0
A8H
I2ADR.6
I2ADR.5
I2ADR.4
I2ADR.3
I2ADR.2
I2ADR.1
I2ADR.0
GC
DF
DE
DD
DC
DB
DA
D9
D8
-
I2EN
STA
STO
SI
AA
-
CRSEL
STA.4
STA.3
STA.2
STA.1
STA.0
0
0
0
AF
AE
AD
AC
AB
AA
A9
A8
EA
EWDRT
EBO
ES/ESR
ET1
EX1
ET0
EX0
P89LPC930/931
DPH
8-bit microcontrollers with two-clock 80C51 core
Rev. 03 — 06 October 2003
B*
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xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
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Name
Description
SFR Bit functions and addresses
addr.
MSB
Bit address
IEN1*
Interrupt enable 1
E8H
Bit address
IP0*
IP0H
Interrupt priority 0
Interrupt priority 0 HIGH
B8H
B7H
Bit address
IP1*
IP1H
Interrupt priority 1
Interrupt priority 1 HIGH
F8H
F7H
Reset value
LSB
Hex
Binary
00[1]
00x00000
EF
EE
ED
EC
EB
EA
E9
E8
-
EST
-
-
ESPI
EC
EKBI
EI2C
BF
BE
BD
BC
BB
BA
B9
B8
-
PWDRT
PBO
PS/PSR
PT1
PX1
PT0
PX0
00[1]
x0000000
00[1]
x0000000
-
PWDRT
H
PBOH
PSH/
PSRH
PT1H
PX1H
PT0H
PX0H
FF
FE
FD
FC
FB
FA
F9
F8
-
PST
-
-
PSPI
PC
PKBI
PI2C
00[1]
00x00000
PI2CH
00[1]
00x00000
KBIF
00[1]
xxxxxx00
-
00
00000000
KBPATN
Keypad pattern register
93H
FF
11111111
P0*
Port 0
Bit address
Port 2
A0H
Bit address
P3*
Port 3
B0H
87
86
85
84
83
82
81
80
T1/KB7
CMP1
/KB6
CMPREF
/KB5
CIN1A
/KB4
CIN1B
/KB3
CIN2A
/KB2
CIN2B
/KB1
CMP2
/KB0
97
96
95
94
93
92
91
90
-
-
RST
INT1
INT0/
SDA
T0/SCL
RXD
TXD
A7
A6
A5
A4
A3
A2
A1
A0
-
-
SPICLK
SS
MISO
MOSI
-
-
B7
B6
B5
B4
B3
B2
B1
B0
-
-
-
-
-
-
XTAL1
XTAL2
[1]
[1]
[1]
[1]
P89LPC930/931
13 of 54
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
P2*
PATN
_SEL
8-bit microcontrollers with two-clock 80C51 core
Rev. 03 — 06 October 2003
86H
90H
-
PKBIH
Keypad interrupt mask
register
Port 1
-
PCH
KBMASK
P1*
-
PSPIH
94H
Bit address
-
-
Keypad control register
80H
-
-
KBCON
Bit address
-
PSTH
Philips Semiconductors
9397 750 12122
Product data
Table 4:
Special function registers…continued
* indicates SFRs that are bit addressable.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx
xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
Description
SFR Bit functions and addresses
addr.
MSB
Reset value
LSB
Hex
Binary
P0M1
Port 0 output mode 1
84H
(P0M1.7) (P0M1.6) (P0M1.5) (P0M1.4) (P0M1.3) (P0M1.2) (P0M1.1) (P0M1.0) FF
11111111
P0M2
Port 0 output mode 2
85H
(P0M2.7) (P0M2.6) (P0M2.5) (P0M2.4) (P0M2.3) (P0M2.2) (P0M2.1) (P0M2.0) 00
00000000
P1M1
P1M2
Port 1 output mode 1
91H
Port 1 output mode 2
92H
(P1M1.7) (P1M1.6)
(P1M2.7) (P1M2.6)
-
(P1M1.4) (P1M1.3) (P1M1.2) (P1M1.1) (P1M1.0)
D3[1]
11x1xx11
(P1M2.4) (P1M2.3) (P1M2.2) (P1M2.1) (P1M2.0)
00[1]
00x0xx00
FF[1]
11111111
P2M1
Port 2 output mode 1
A4H
(P2M1.7) (P2M1.6) (P2M1.5) (P2M1.4) (P2M1.3) (P2M1.2) (P2M1.1) (P2M1.0)
P2M2
Port 2 output mode 2
A5H
(P2M2.7) (P2M2.6) (P2M2.5) (P2M2.4) (P2M2.3) (P2M2.2) (P2M2.1) (P2M2.0) 00
P3M1
Port 3 output mode 1
Port 3 output mode 2
PCON
PCONA
-
-
-
-
-
xxxxxx11
(P3M2.1) (P3M2.0)
00[1]
xxxxxx00
-
-
-
-
Power control register
87H
SMOD1
SMOD0
BOPD
BOI
GF1
GF0
PMOD1
PMOD0
Power control register A
B5H
RTCPD
-
VCPD
-
I2PD
SPPD
SPD
-
D7
D6
D5
D4
D3
D2
D1
D0
CY
AC
F0
RS1
RS0
OV
F1
00
00000000
00[1]
00000000
P
00
00000000
00
xx00000x
PSW*
Program status word
PT0AD
Port 0 digital input disable
F6H
-
-
PT0AD.5
PT0AD.4
PT0AD.3
PT0AD.2
PT0AD.1
-
RSTSRC
Reset source register
DFH
-
-
BOF
POF
R_BK
R_WD
R_SF
R_EX
RTCCON
D0H
-
(P3M1.1) (P3M1.0)
B2H
Bit address
-
-
Real-time clock control
D1H
RTCF
RTCS1
RTCS0
-
-
-
00000000
03[1]
ERTC
RTCEN
[3]
60[1]
011xxx00
[6]
RTCH
Real-time clock register HIGH
D2H
00[6]
00000000
00000000
Real-time clock register LOW
D3H
SADDR
Serial port address register
A9H
00
00000000
SADEN
Serial port address enable
B9H
00
00000000
SBUF
Serial port data buffer register
99H
xx
xxxxxxxx
9F
9E
9D
9C
9B
9A
99
98
SCON*
Serial port control
98H
SM0/FE
SM1
SM2
REN
TB8
RB8
TI
RI
00
00000000
SSTAT
Serial port extended status
register
BAH
DBMOD
INTLO
CIDIS
DBISEL
FE
BR
OE
STINT
00
00000000
SP
Stack pointer
81H
07
00000111
SPCTL
SPI Control Register
E2H
SSIG
SPEN
DORD
MSTR
CPOL
CPHA
SPR1
SPR0
04
00000100
SPSTAT
SPI Status Register
E1H
SPIF
WCOL
-
-
-
-
-
-
00
00xxxxxx
SPDAT
SPI Data Register
E3H
00
00000000
Bit address
P89LPC930/931
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Product data
Table 4:
Special function registers…continued
* indicates SFRs that are bit addressable.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx
xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
TAMOD
Description
SFR Bit functions and addresses
addr.
MSB
Timer 0 and 1 auxiliary mode
8FH
Bit address
Reset value
LSB
Hex
Binary
00
xxx0xxx0
00
00000000
-
-
-
T1M2
-
-
-
T0M2
8F
8E
8D
8C
8B
8A
89
88
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
TCON*
Timer 0 and 1 control
88H
TH0
Timer 0 HIGH
8CH
00
00000000
TH1
Timer 1 HIGH
8DH
00
00000000
TL0
Timer 0 LOW
8AH
00
00000000
TL1
Timer 1 LOW
8BH
00
00000000
TMOD
Timer 0 and 1 mode
89H
T1GATE
T1C/T
T1M1
T1M0
T0GATE
T0C/T
T0M1
T0M0
00
00000000
Internal oscillator trim register
96H
-
ENCLK
TRIM.5
TRIM.4
TRIM.3
TRIM.2
TRIM.1
TRIM.0
WDCON
Watchdog control register
A7H
PRE2
PRE1
PRE0
-
-
WDRUN
WDTOF
WDCLK
[4] [6]
WDL
Watchdog load
C1H
WFEED1
Watchdog feed 1
C2H
WFEED2
Watchdog feed 2
C3H
[3]
[4]
11111111
All ports are in input only (high impedance) state after power-up.
BRGR1 and BRGR0 must only be written if BRGEN in BRGCON SFR is ‘0’. If any are written while BRGEN = 1, the result is unpredictable.
Unimplemented bits in SFRs (labeled ’-’) are X (unknown) at all times. Unless otherwise specified, ones should not be written to these bits since they may be used for other
purposes in future derivatives. The reset values shown for these bits are ’0’s although they are unknown when read.
The RSTSRC register reflects the cause of the P89LPC930/931 reset. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the power-on reset value is
xx110000.
After reset, the value is 111001x1, i.e., PRE2-PRE0 are all ‘1’, WDRUN = 1 and WDCLK = 1. WDTOF bit is ‘1’ after Watchdog reset and is ‘0’ after power-on reset. Other resets will
not affect WDTOF.
On power-on reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register.
The only reset source that affects these SFRs is power-on reset.
P89LPC930/931
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[5] [6]
[1]
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Table 4:
Special function registers…continued
* indicates SFRs that are bit addressable.
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
8. Functional description
Remark: Please refer to the P89LPC930/931 User’s Manual for a more detailed
functional description.
8.1 Enhanced CPU
The P89LPC930/931 uses an enhanced 80C51 CPU which runs at 6 times the speed
of standard 80C51 devices. A machine cycle consists of two CPU clock cycles, and
most instructions execute in one or two machine cycles.
8.2 Clocks
8.2.1
Clock definitions
The P89LPC930/931 device has several internal clocks as defined below:
OSCCLK — Input to the DIVM clock divider. OSCCLK is selected from one of four
clock sources (see Figure 4) and can also be optionally divided to a slower frequency
(see Section 8.7 “CPU CLOCK (CCLK) modification: DIVM register”).
Note: fOSC is defined as the OSCCLK frequency.
CCLK — CPU clock; output of the clock divider. There are two CCLK cycles per
machine cycle, and most instructions are executed in one to two machine cycles (two
or four CCLK cycles).
RCCLK — The internal 7.373 MHz RC oscillator output.
PCLK — Clock for the various peripheral devices and is CCLK/2
8.2.2
CPU clock (OSCCLK)
The P89LPC930/931 provides several user-selectable oscillator options in generating
the CPU clock. This allows optimization for a range of needs from high precision to
lowest possible cost. These options are configured when the FLASH is programmed
and include an on-chip Watchdog oscillator, an on-chip RC oscillator, an oscillator
using an external crystal, or an external clock source. The crystal oscillator can be
optimized for low, medium, or high frequency crystals covering a range from 20 kHz
to 12 MHz.
8.2.3
Low speed oscillator option
This option supports an external crystal in the range of 20 kHz to 100 kHz. Ceramic
resonators are also supported in this configuration.
8.2.4
Medium speed oscillator option
This option supports an external crystal in the range of 100 kHz to 4 MHz. Ceramic
resonators are also supported in this configuration.
8.2.5
High speed oscillator option
This option supports an external crystal in the range of 4 MHz to 12 MHz. Ceramic
resonators are also supported in this configuration.
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8.2.6
Clock output
The P89LPC930/931 supports a user-selectable clock output function on the
XTAL2/CLKOUT pin when crystal oscillator is not being used. This condition occurs if
another clock source has been selected (on-chip RC oscillator, Watchdog oscillator,
external clock input on X1) and if the Real-Time clock is not using the crystal
oscillator as its clock source. This allows external devices to synchronize to the
P89LPC930/931. This output is enabled by the ENCLK bit in the TRIM register. The
frequency of this clock output is 1⁄2 that of the CCLK. If the clock output is not needed
in Idle mode, it may be turned off prior to entering Idle, saving additional power.
8.3 On-chip RC oscillator option
The P89LPC930/931 has a 6-bit TRIM register that can be used to tune the
frequency of the RC oscillator. During reset, the TRIM value is initialized to a factory
pre-programmed value to adjust the oscillator frequency to 7.373 MHz, ±2.5%.
End-user applications can write to the Trim register to adjust the on-chip RC oscillator
to other frequencies.
8.4 Watchdog oscillator option
The watchdog has a separate oscillator which has a frequency of 400 kHz. This
oscillator can be used to save power when a high clock frequency is not needed.
8.5 External clock input option
In this configuration, the processor clock is derived from an external source driving
the XTAL1/P3.1 pin. The rate may be from 0 Hz up to 12 MHz. The XTAL2/P3.0 pin
may be used as a standard port pin or a clock output.
XTAL1
XTAL2
High freq.
Med. freq.
Low freq.
RTC
OSCCLK
DIVM
RC
OSCILLATOR
CCLK
CPU
¸2
(7.3728 MHz)
WDT
WATCHDOG
OSCILLATOR
SPI
(400 kHz)
PCLK
TIMER 0 and
TIMER 1
I2C
BAUD RATE
GENERATOR
UART
002aaa431
Fig 4. Block diagram of oscillator control.
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8.6 CPU CLock (CCLK) wake-up delay
The P89LPC930/931 has an internal wake-up timer that delays the clock until it
stabilizes depending to the clock source used. If the clock source is any of the three
crystal selections (low, medium and high frequencies) the delay is 992 OSCCLK
cycles plus 60 to 100 µs. If the clock source is either the internal RC oscillator,
Watchdog oscillator, or external clock, the delay is 224 OSCCLK cycles plus
60 to 100 µs.
8.7 CPU CLOCK (CCLK) modification: DIVM register
The OSCCLK frequency can be divided down up to 256 times by configuring a
dividing register, DIVM, to generate CCLK. This feature makes it possible to
temporarily run the CPU at a lower rate, reducing power consumption. By dividing the
clock, the CPU can retain the ability to respond to events that would not exit Idle
mode by executing its normal program at a lower rate. This can also allow bypassing
the oscillator start-up time in cases where Power-down mode would otherwise be
used. The value of DIVM may be changed by the program at any time without
interrupting code execution.
8.8 Low power select
The P89LPC930/931 is designed to run at 12 MHz (CCLK) maximum. However, if
CCLK is 8 MHz or slower, the CLKLP SFR bit (AUXR1.7) can be set to ‘1’ to lower the
power consumption further. On any reset, CLKLP is ‘0’ allowing highest performance
access. This bit can then be set in software if CCLK is running at 8 MHz or slower.
8.9 Memory organization
The various P89LPC930/931 memory spaces are as follows:
• DATA
128 bytes of internal data memory space (00h:7Fh) accessed via direct or indirect
addressing, using instruction other than MOVX and MOVC. All or part of the Stack
may be in this area.
• IDATA
Indirect Data. 256 bytes of internal data memory space (00h:FFh) accessed via
indirect addressing using instructions other than MOVX and MOVC. All or part of
the Stack may be in this area. This area includes the DATA area and the 128 bytes
immediately above it.
• SFR
Special Function Registers. Selected CPU registers and peripheral control and
status registers, accessible only via direct addressing.
• CODE
64 kB of Code memory space, accessed as part of program execution and via the
MOVC instruction. The P89LPC930/931 has 4 kB/ 8 kB of on-chip Code memory.
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8.10 Interrupts
The P89LPC930/931 uses a four priority level interrupt structure. This allows great
flexibility in controlling the handling of the many interrupt sources. The
P89LPC930/931 supports 13 interrupt sources: external interrupts 0 and 1, timers 0
and 1, serial port Tx, serial port Rx, combined serial port Rx/Tx, brownout detect,
watchdog/real-time clock, I2C, keyboard, and comparators 1 and 2, and SPI.
Each interrupt source can be individually enabled or disabled by setting or clearing a
bit in the interrupt enable registers IEN0 or IEN1. The IEN0 register also contains a
global disable bit, EA, which disables all interrupts.
Each interrupt source can be individually programmed to one of four priority levels by
setting or clearing bits in the interrupt priority registers IP0, IP0H, IP1, and IP1H. An
interrupt service routine in progress can be interrupted by a higher priority interrupt,
but not by another interrupt of the same or lower priority. The highest priority interrupt
service cannot be interrupted by any other interrupt source. If two requests of
different priority levels are pending at the start of an instruction, the request of higher
priority level is serviced.
If requests of the same priority level are pending at the start of an instruction, an
internal polling sequence determines which request is serviced. This is called the
arbitration ranking. Note that the arbitration ranking is only used to resolve pending
requests of the same priority level.
8.10.1
External interrupt inputs
The P89LPC930/931 has two external interrupt inputs as well as the Keypad Interrupt
function. The two interrupt inputs are identical to those present on the standard
80C51 microcontrollers.
These external interrupts can be programmed to be level-triggered or edge-triggered
by setting or clearing bit IT1 or IT0 in Register TCON.
In edge-triggered mode if successive samples of the INTn pin show a HIGH in one
cycle and a LOW in the next cycle, the interrupt request flag IEn in TCON is set,
causing an interrupt request.
If an external interrupt is enabled when the P89LPC930/931 is put into Power-down
or Idle mode, the interrupt will cause the processor to wake-up and resume operation.
Refer to Section 8.13 “Power reduction modes” for details.
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IE0
EX0
IE1
EX1
BOPD
EBO
RTCF
ERTC
(RTCCON.1)
WDOVF
WAKE-UP
(IF IN POWER-DOWN)
KBIF
EKBI
EWDRT
CMF2
CMF1
EC
EA (IE0.7)
TF0
ET0
TF1
ET1
TI & RI/RI
ES/ESR
INTERRUPT
TO CPU
TI
EST
SI
EI2C
002aaa432
SPIF
ESPI
Fig 5. Interrupt sources, interrupt enables, and power-down wake-up sources.
8.11 I/O ports
The P89LPC930/931 has four I/O ports: Port 0, Port 1, Port 2, and Port 3. Ports 0, 1
and 2 are 8-bit ports, and Port 3 is a 2-bit port. The exact number of I/O pins available
depend upon the clock and reset options chosen, as shown in Table 5.
Table 5:
Number of I/O pins available
Clock source
Reset option
Number of I/O pins
(20-pin package)
On-chip oscillator or Watchdog oscillator
No external reset (except during power-up)
26
External RST pin supported
25
External clock input
Low/medium/high speed oscillator
(external crystal or resonator)
8.11.1
No external reset (except during power-up)
25
External RST pin supported
24
No external reset (except during power-up)
24
External RST pin supported
23
Port configurations
All but three I/O port pins on the P89LPC930/931 may be configured by software to
one of four types on a bit-by-bit basis. These are: quasi-bidirectional (standard 80C51
port outputs), push-pull, open drain, and input-only. Two configuration registers for
each port select the output type for each port pin.
P1.5 (RST) can only be an input and cannot be configured.
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P1.2 (SCL/T0) and P1.3 (SDA/INT0) may only be configured to be either input-only or
open-drain.
8.11.2
Quasi-bidirectional output configuration
Quasi-bidirectional outputs can be used as both an input and output without the need
to reconfigure the port. This is possible because when the port outputs a logic HIGH,
it is weakly driven, allowing an external device to pull the pin LOW. When the pin is
driven LOW, it is driven strongly and able to sink a fairly large current. These features
are somewhat similar to an open-drain output except that there are three pull-up
transistors in the quasi-bidirectional output that serve different purposes.
The P89LPC930/931 is a 3 V device, but the pins are 5 V-tolerant. In
quasi-bidirectional mode, if a user applies 5 V on the pin, there will be a current
flowing from the pin to VDD, causing extra power consumption. Therefore, applying
5 V in quasi-bidirectional mode is discouraged.
A quasi-bidirectional port pin has a Schmitt-triggered input that also has a glitch
suppression circuit.
8.11.3
Open-drain output configuration
The open-drain output configuration turns off all pull-ups and only drives the
pull-down transistor of the port driver when the port latch contains a logic ‘0’. To be
used as a logic output, a port configured in this manner must have an external
pull-up, typically a resistor tied to VDD.
An open-drain port pin has a Schmitt-triggered input that also has a glitch
suppression circuit.
8.11.4
Input-only configuration
The input-only port configuration has no output drivers. It is a Schmitt-triggered input
that also has a glitch suppression circuit.
8.11.5
Push-pull output configuration
The push-pull output configuration has the same pull-down structure as both the
open-drain and the quasi-bidirectional output modes, but provides a continuous
strong pull-up when the port latch contains a logic ‘1’. The push-pull mode may be
used when more source current is needed from a port output. A push-pull port pin
has a Schmitt-triggered input that also has a glitch suppression circuit.
8.11.6
Port 0 analog functions
The P89LPC930/931 incorporates two Analog Comparators. In order to give the best
analog function performance and to minimize power consumption, pins that are being
used for analog functions must have the digital outputs and digital inputs disabled.
Digital outputs are disabled by putting the port output into the Input-Only (high
impedance) mode as described in Section 8.11.4.
Digital inputs on Port 0 may be disabled through the use of the PT0AD register,
bits 1:5. On any reset, PT0AD1:5 defaults to ‘0’s to enable digital functions.
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8.11.7
Additional port features
After power-up, all pins are in Input-Only mode. Please note that this is different
from the LPC76x series of devices.
• After power-up, all I/O pins except P1.5, may be configured by software.
• Pin P1.5 is input only. Pins P1.2 and P1.3 and are configurable for either input-only
or open-drain.
Every output on the P89LPC930/931 has been designed to sink typical LED drive
current. However, there is a maximum total output current for all ports which must not
be exceeded. Please refer to Table 7 “DC electrical characteristics” for detailed
specifications.
All ports pins that can function as an output have slew rate controlled outputs to limit
noise generated by quickly switching output signals. The slew rate is factory-set to
approximately 10 ns rise and fall times.
8.12 Power monitoring functions
The P89LPC930/931 incorporates power monitoring functions designed to prevent
incorrect operation during initial power-up and power loss or reduction during
operation. This is accomplished with two hardware functions: Power-on Detect and
Brownout detect.
8.12.1
Brownout detection
The Brownout detect function determines if the power supply voltage drops below a
certain level. The default operation is for a Brownout detection to cause a processor
reset, however it may alternatively be configured to generate an interrupt.
Brownout detection may be enabled or disabled in software.
If Brownout detection is enabled, the operating voltage range for VDD is 2.7 V to 3.6 V,
and the brownout condition occurs when VDD falls below the brownout trip voltage,
VBO (see Table 7 “DC electrical characteristics”), and is negated when VDD rises
above VBO. If brownout detection is disabled, the operating voltage range for VDD is
2.4 V to 3.6 V. If the P89LPC930/931 device is to operate with a power supply that
can be below 2.7 V, BOE should be left in the unprogrammed state so that the device
can operate at 2.4 V, otherwise continuous brownout reset may prevent the device
from operating.
For correct activation of Brownout detect, the VDD rise and fall times must be
observed. Please see Table 7 “DC electrical characteristics” for specifications.
8.12.2
Power-on detection
The Power-on Detect has a function similar to the Brownout detect, but is designed to
work as power comes up initially, before the power supply voltage reaches a level
where Brownout detect can work. The POF flag in the RSTSRC register is set to
indicate an initial power-up condition. The POF flag will remain set until cleared by
software.
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8.13 Power reduction modes
The P89LPC930/931 supports three different power reduction modes. These modes
are Idle mode, Power-down mode, and total Power-down mode.
8.13.1
Idle mode
Idle mode leaves peripherals running in order to allow them to activate the processor
when an interrupt is generated. Any enabled interrupt source or reset may terminate
Idle mode.
8.13.2
Power-down mode
The Power-down mode stops the oscillator in order to minimize power consumption.
The P89LPC930/931 exits Power-down mode via any reset, or certain interrupts. In
Power-down mode, the power supply voltage may be reduced to the RAM keep-alive
voltage VRAM. This retains the RAM contents at the point where Power-down mode
was entered. SFR contents are not guaranteed after VDD has been lowered to VRAM,
therefore it is highly recommended to wake up the processor via reset in this case.
VDD must be raised to within the operating range before the Power-down mode is
exited.
Some chip functions continue to operate and draw power during Power-down mode,
increasing the total power used during Power-down. These include: Brownout detect,
Watchdog Timer, Comparators (note that Comparators can be powered-down
separately), and Real-Time Clock (RTC)/System Timer. The internal RC oscillator is
disabled unless both the RC oscillator has been selected as the system clock and the
RTC is enabled.
8.13.3
Total Power-down mode
This is the same as Power-down mode except that the brownout detection circuitry
and the voltage comparators are also disabled to conserve additional power. The
internal RC oscillator is disabled unless both the RC oscillator has been selected as
the system clock and the RTC is enabled. If the internal RC oscillator is used to clock
the RTC during Power-down, there will be high power consumption. Please use an
external low frequency clock to achieve low power with the Real-Time Clock running
during Power-down.
8.14 Reset
The P1.5/RST pin can function as either an active-LOW reset input or as a digital
input, P1.5. The RPE (Reset Pin Enable) bit in UCFG1, when set to ‘1’, enables the
external reset input function on P1.5. When cleared, P1.5 may be used as an input
pin.
Remark: During a power-up sequence, the RPE selection is overridden and this pin
will always function as a reset input. An external circuit connected to this pin
should not hold this pin LOW during a power-on sequence as this will keep the
device in reset. After power-up this input will function either as an external reset
input or as a digital input as defined by the RPE bit. Only a power-up reset will
temporarily override the selection defined by RPE bit. Other sources of reset will not
override the RPE bit.
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Remark: During a power cycle, VDD must fall below VPOR (see Table 7 “DC electrical
characteristics” on page 40) before power is reapplied, in order to ensure a power-on
reset.
Reset can be triggered from the following sources:
•
•
•
•
•
•
External reset pin (during power-up or if user configured via UCFG1)
Power-on detect
Brownout detect
Watchdog Timer
Software reset
UART break character detect reset
For every reset source, there is a flag in the Reset Register, RSTSRC. The user can
read this register to determine the most recent reset source. These flag bits can be
cleared in software by writing a ‘0’ to the corresponding bit. More than one flag bit
may be set:
• During a power-on reset, both POF and BOF are set but the other flag bits are
cleared.
• For any other reset, previously set flag bits that have not been cleared will remain
set.
8.14.1
Reset vector
Following reset, the P89LPC930/931 will fetch instructions from either address 0000h
or the Boot address. The Boot address is formed by using the Boot Vector as the high
byte of the address and the low byte of the address = 00h.
The Boot address will be used if a UART break reset occurs, or the non-volatile Boot
Status bit (BOOTSTAT.0) = 1, or the device is forced into ISP mode during power-on
(see P89LPC930/931 User’s Manual). Otherwise, instructions will be fetched from
address 0000H.
8.15 Timers/counters 0 and 1
The P89LPC930/931 has two general purpose counter/timers which are upward
compatible with the standard 80C51 Timer 0 and Timer 1. Both can be configured to
operate either as timers or event counter. An option to automatically toggle the T0
and/or T1 pins upon timer overflow has been added.
In the ‘Timer’ function, the register is incremented every machine cycle.
In the ‘Counter’ function, the register is incremented in response to a 1-to-0 transition
at its corresponding external input pin, T0 or T1. In this function, the external input is
sampled once during every machine cycle.
Timer 0 and Timer 1 have five operating modes (modes 0, 1, 2, 3 and 6). Modes 0, 1,
2 and 6 are the same for both Timers/Counters. Mode 3 is different.
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8.15.1
Mode 0
Putting either Timer into Mode 0 makes it look like an 8048 Timer, which is an 8-bit
Counter with a divide-by-32 prescaler. In this mode, the Timer register is configured
as a 13-bit register. Mode 0 operation is the same for Timer 0 and Timer 1.
8.15.2
Mode 1
Mode 1 is the same as Mode 0, except that all 16 bits of the timer register are used.
8.15.3
Mode 2
Mode 2 configures the Timer register as an 8-bit Counter with automatic reload.
Mode 2 operation is the same for Timer 0 and Timer 1.
8.15.4
Mode 3
When Timer 1 is in Mode 3 it is stopped. Timer 0 in Mode 3 forms two separate 8-bit
counters and is provided for applications that require an extra 8-bit timer. When
Timer 1 is in Mode 3 it can still be used by the serial port as a baud rate generator.
8.15.5
Mode 6
In this mode, the corresponding timer can be changed to a PWM with a full period of
256 timer clocks.
8.15.6
Timer overflow toggle output
Timers 0 and 1 can be configured to automatically toggle a port output whenever a
timer overflow occurs. The same device pins that are used for the T0 and T1 count
inputs are also used for the timer toggle outputs. The port outputs will be a logic ‘1’
prior to the first timer overflow when this mode is turned on.
8.16 Real-Time clock/system timer
The P89LPC930/931 has a simple Real-Time clock that allows a user to continue
running an accurate timer while the rest of the device is powered-down. The
Real-Time clock can be a wake-up or an interrupt source. The Real-Time clock is a
23-bit down counter comprised of a 7-bit prescaler and a 16-bit loadable down
counter. When it reaches all ‘0’s, the counter will be reloaded again and the RTCF
flag will be set. The clock source for this counter can be either the CPU clock (CCLK)
or the XTAL oscillator, provided that the XTAL oscillator is not being used as the CPU
clock. If the XTAL oscillator is used as the CPU clock, then the RTC will use CCLK as
its clock source. Only power-on reset will reset the Real-Time clock and its
associated SFRs to the default state.
8.17 UART
The P89LPC930/931 has an enhanced UART that is compatible with the
conventional 80C51 UART except that Timer 2 overflow cannot be used as a baud
rate source. The P89LPC930/931 does include an independent Baud Rate
Generator. The baud rate can be selected from the oscillator (divided by a constant),
Timer 1 overflow, or the independent Baud Rate Generator. In addition to the baud
rate generation, enhancements over the standard 80C51 UART include Framing
Error detection, automatic address recognition, selectable double buffering and
several interrupt options. The UART can be operated in 4 modes: shift register, 8-bit
UART, 9-bit UART, and CPU clock/32 or CPU clock/16.
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8.17.1
Mode 0
Serial data enters and exits through RxD. TxD outputs the shift clock. 8 bits are
transmitted or received, LSB first. The baud rate is fixed at 1⁄16 of the CPU clock
frequency.
8.17.2
Mode 1
10 bits are transmitted (through TxD) or received (through RxD): a start bit (logic ‘0’),
8 data bits (LSB first), and a stop bit (logic ‘1’). When data is received, the stop bit is
stored in RB8 in Special Function Register SCON. The baud rate is variable and is
determined by the Timer 1 overflow rate or the Baud Rate Generator (described in
Section 8.17.5 “Baud rate generator and selection”).
8.17.3
Mode 2
11 bits are transmitted (through TxD) or received (through RxD): start bit (logic ‘0’),
8 data bits (LSB first), a programmable 9th data bit, and a stop bit (logic ‘1’). When
data is transmitted, the 9th data bit (TB8 in SCON) can be assigned the value of ‘0’ or
‘1’. Or, for example, the parity bit (P, in the PSW) could be moved into TB8. When
data is received, the 9th data bit goes into RB8 in Special Function Register SCON,
while the stop bit is not saved. The baud rate is programmable to either 1⁄16 or 1⁄32 of
the CPU clock frequency, as determined by the SMOD1 bit in PCON.
8.17.4
Mode 3
11 bits are transmitted (through TxD) or received (through RxD): a start bit (logic ‘0’),
8 data bits (LSB first), a programmable 9th data bit, and a stop bit (logic ‘1’). In fact,
Mode 3 is the same as Mode 2 in all respects except baud rate. The baud rate in
Mode 3 is variable and is determined by the Timer 1 overflow rate or the Baud Rate
Generator (described in section Section 8.17.5 “Baud rate generator and selection”).
8.17.5
Baud rate generator and selection
The P89LPC930/931 enhanced UART has an independent Baud Rate Generator.
The baud rate is determined by a baud-rate preprogrammed into the BRGR1 and
BRGR0 SFRs which together form a 16-bit baud rate divisor value that works in a
similar manner as Timer 1. If the baud rate generator is used, Timer 1 can be used for
other timing functions.
The UART can use either Timer 1 or the baud rate generator output (see Figure 6).
Note that Timer T1 is further divided by 2 if the SMOD1 bit (PCON.7) is cleared. The
independent Baud Rate Generator uses OSCCLK.
Timer 1 Overflow
(PCLK-based)
SMOD1 = 1
¸2
SBRGS = 0
Baud Rate Modes 1 and 3
SMOD1 = 0
Baud Rate Generator
(CCLK-based)
SBRGS = 1
002aaa419
Fig 6. Baud rate sources for UART (Modes 1, 3).
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8.17.6
Framing error
Framing error is reported in the status register (SSTAT). In addition, if SMOD0
(PCON.6) is ‘1’, framing errors can be made available in SCON.7 respectively. If
SMOD0 is ‘0’, SCON.7 is SM0. It is recommended that SM0 and SM1 (SCON.7:6)
are set up when SMOD0 is ‘0’.
8.17.7
Break detect
Break detect is reported in the status register (SSTAT). A break is detected when
11 consecutive bits are sensed LOW. The break detect can be used to reset the
device and force the device into ISP mode.
8.17.8
Double buffering
The UART has a transmit double buffer that allows buffering of the next character to
be written to SBUF while the first character is being transmitted. Double buffering
allows transmission of a string of characters with only one stop bit between any two
characters, as long as the next character is written between the start bit and the stop
bit of the previous character.
Double buffering can be disabled. If disabled (DBMOD, i.e., SSTAT.7 = ‘0’), the UART
is compatible with the conventional 80C51 UART. If enabled, the UART allows writing
to SnBUF while the previous data is being shifted out. Double buffering is only
allowed in Modes 1, 2 and 3. When operated in Mode 0, double buffering must be
disabled (DBMOD = ‘0’).
8.17.9
Transmit interrupts with double buffering enabled (Modes 1, 2 and 3)
Unlike the conventional UART, in double buffering mode, the Tx interrupt is generated
when the double buffer is ready to receive new data.
8.17.10
The 9th bit (bit 8) in double buffering (Modes 1, 2 and 3)
If double buffering is disabled TB8 can be written before or after SBUF is written, as
long as TB8 is updated some time before that bit is shifted out. TB8 must not be
changed until the bit is shifted out, as indicated by the Tx interrupt.
If double buffering is enabled, TB8 must be updated before SBUF is written, as TB8
will be double-buffered together with SBUF data.
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8.18 I2C-bus serial interface
I2C-bus uses two wires (SDA and SCL) to transfer information between devices
connected to the bus, and it has the following features:
• Bidirectional data transfer between masters and slaves.
• Multimaster bus (no central master).
• Arbitration between simultaneously transmitting masters without corruption of
serial data on the bus.
• Serial clock synchronization allows devices with different bit rates to communicate
via one serial bus.
• Serial clock synchronization can be used as a handshake mechanism to suspend
and resume serial transfer.
• The I2C-bus may be used for test and diagnostic purposes.
A typical I2C-bus configuration is shown in Figure 7. The P89LPC930/931 device
provides a byte-oriented I2C-bus interface that supports data transfers up to 400 kHz.
RP
RP
SDA
I2C-BUS
SCL
P1.3/SDA
P1.2/SCL
P89LPC930/931
OTHER DEVICE
WITH I2C-BUS
INTERFACE
OTHER DEVICE
WITH I2C-BUS
INTERFACE
002aaa433
Fig 7. I2C-bus configuration.
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8
I2ADR
ADDRESS REGISTER
INTERNAL BUS
P1.3
COMPARATOR
INPUT
FILTER
P1.3/SDA
SHIFT REGISTER
OUTPUT
STAGE
ACK
I2DAT
8
BIT COUNTER /
ARBITRATION &
SYNC LOGIC
INPUT
FILTER
P1.2/SCL
SERIAL CLOCK
GENERATOR
OUTPUT
STAGE
CCLK
TIMING
&
CONTROL
LOGIC
INTERRUPT
TIMER 1
OVERFLOW
P1.2
I2CON
I2SCLH
I2SCLL
CONTROL REGISTERS &
SCL DUTY CYCLE REGISTERS
8
STATUS BUS
I2STAT
STATUS
DECODER
STATUS REGISTER
8
002aaa421
Fig 8. I2C-bus serial interface block diagram.
8.19 Serial Peripheral Interface (SPI)
LPC930/931 provides another high-speed serial communication interface - the SPI
interface. SPI is a full-duplex, high-speed, synchronous communication bus with two
operation modes: Master mode and Slave mode. Up to 3 Mbit/s can be supported in
either Master or Slave mode. It has a Transfer Completion Flag and Write Collision
Flag Protection.
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S
M
8-BIT SHIFT REGISTER
READ DATA BUFFER
DIVIDER
BY 4, 16, 64, 128
clock
SPI clock (master)
MSTR
MOSI
P2.2
SPICLK
P2.5
SS
P2.4
SPR0
SPR1
CPOL
CPHA
MSTR
DORD
SSIG
WCOL
SPI STATUS REGISTER
SPEN
MSTR
SPEN
SPI CONTROL
SPIF
S
M
CLOCK LOGIC
SPR0
SPR1
SELECT
MISO
P2.3
PIN CONTROL LOGIC
M
S
SPEN
CPU clock
SPI CONTROL REGISTER
SPI
interrupt
request
internal
data
bus
002aaa434
Fig 9. SPI block diagram.
The SPI interface has four pins: SPICLK, MOSI, MISO, and SS:
• SPICLK, MOSI and MISO are typically tied together between two or more SPI
devices. Data flows from master to slave on MOSI (Master Out Slave In) pin and
flows from slave to master on MISO (Master In Slave Out) pin. The SPICLK signal
is output in the master mode and is input in the slave mode. If the SPI system is
disabled, i.e. SPEN (SPCTL.6) = 0 (reset value), these pins are configured for port
functions.
• SS is the optional slave select pin. In a typical configuration, an SPI master asserts
one of its port pins to select one SPI device as the current slave. An SPI slave
device uses its SS pin to determine whether it is selected.
Typical connections are shown in Figures 10, 11, and 12.
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8.19.1
Typical SPI configurations
Master
8-BIT SHIFT
REGISTER
Slave
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
PORT
8-BIT SHIFT
REGISTER
SPICLK
SS
002aaa435
Fig 10. SPI single master single slave configuration.
Master
8-BIT SHIFT
REGISTER
Slave
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
SS
8-BIT SHIFT
REGISTER
SPICLK
SS
SPI CLOCK
GENERATOR
002aaa436
Fig 11. SPI dual device configuration, where either can be a master or a slave.
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Master
8-BIT SHIFT
REGISTER
Slave
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
8-BIT SHIFT
REGISTER
SPICLK
port
SS
Slave
MISO
MOSI
8-BIT SHIFT
REGISTER
SPICLK
port
SS
002aaa437
Fig 12. SPI single master multiple slaves configuration.
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8.20 Analog comparators
Two analog comparators are provided on the P89LPC930/931. Input and output
options allow use of the comparators in a number of different configurations.
Comparator operation is such that the output is a logic 1 (which may be read in a
register and/or routed to a pin) when the positive input (one of two selectable pins) is
greater than the negative input (selectable from a pin or an internal reference
voltage). Otherwise the output is a ‘0’. Each comparator may be configured to cause
an interrupt when the output value changes.
The overall connections to both comparators are shown in Figure 13. The
comparators function to VDD = 2.4 V.
When each comparator is first enabled, the comparator output and interrupt flag are
not guaranteed to be stable for 10 microseconds. The corresponding comparator
interrupt should not be enabled during that time, and the comparator interrupt flag
must be cleared before the interrupt is enabled in order to prevent an immediate
interrupt service.
When a comparator is disabled the comparator’s output, COx, goes HIGH. If the
comparator output was LOW and then is disabled, the resulting transition of the
comparator output from a LOW to HIGH state will set the comparator flag, CMFx.
This will cause an interrupt if the comparator interrupt is enabled. The user should
therefore disable the comparator interrupt prior to disabling the comparator.
Additionally, the user should clear the comparator flag, CMFx, after disabling the
comparator.
CP1
Comparator 1
OE1
(P0.4) CIN1A
(P0.3) CIN1B
CO1
CMP1 (P0.6)
(P0.5) CMPREF
Change Detect
VREF
CMF1
CN1
Interrupt
Change Detect
CP2
Comparator 2
EC
CMF2
(P0.2) CIN2A
(P0.1) CIN2B
CMP2 (P0.0)
CO2
OE2
002aaa422
CN2
Fig 13. Comparator input and output connections.
8.20.1
Internal reference voltage
An internal reference voltage generator may supply a default reference when a single
comparator input pin is used. The value of the internal reference voltage, referred to
as VREF, is 1.23 V 10%.
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8.20.2
Comparator interrupt
Each comparator has an interrupt flag contained in its configuration register. This flag
is set whenever the comparator output changes state. The flag may be polled by
software or may be used to generate an interrupt. The two comparators use one
common interrupt vector. If both comparators enable interrupts, after entering the
interrupt service routine, the user needs to read the flags to determine which
comparator caused the interrupt.
8.20.3
Comparators and power reduction modes
Either or both comparators may remain enabled when Power-down or Idle mode is
activated, but both comparators are disabled automatically in Total Power-down
mode.
If a comparator interrupt is enabled (except in Total Power-down mode), a change of
the comparator output state will generate an interrupt and wake up the processor. If
the comparator output to a pin is enabled, the pin should be configured in the
push-pull mode in order to obtain fast switching times while in power-down mode. The
reason is that with the oscillator stopped, the temporary strong pull-up that normally
occurs during switching on a quasi-bidirectional port pin does not take place.
Comparators consume power in Power-down and Idle modes, as well as in the
normal operating mode. This fact should be taken into account when system power
consumption is an issue. To minimize power consumption, the user can disable the
comparators via PCONA.5, or put the device in Total Power-down mode.
8.21 Keypad interrupt (KBI)
The Keypad Interrupt function is intended primarily to allow a single interrupt to be
generated when Port 0 is equal to or not equal to a certain pattern. This function can
be used for bus address recognition or keypad recognition. The user can configure
the port via SFRs for different tasks.
The Keypad Interrupt Mask Register (KBMASK) is used to define which input pins
connected to Port 0 can trigger the interrupt. The Keypad Pattern Register (KBPATN)
is used to define a pattern that is compared to the value of Port 0. The Keypad
Interrupt Flag (KBIF) in the Keypad Interrupt Control Register (KBCON) is set when
the condition is matched while the Keypad Interrupt function is active. An interrupt will
be generated if enabled. The PATN_SEL bit in the Keypad Interrupt Control Register
(KBCON) is used to define equal or not-equal for the comparison.
In order to use the Keypad Interrupt as an original KBI function like in 87LPC76x
series, the user needs to set KBPATN = 0FFH and PATN_SEL = 1 (not equal), then
any key connected to Port 0 which is enabled by the KBMASK register will cause the
hardware to set KBIF and generate an interrupt if it has been enabled. The interrupt
may be used to wake up the CPU from Idle or Power-down modes. This feature is
particularly useful in handheld, battery-powered systems that need to carefully
manage power consumption yet also need to be convenient to use.
In order to set the flag and cause an interrupt, the pattern on Port 0 must be held
longer than 6 CCLKs.
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8.22 Watchdog timer
The Watchdog timer causes a system reset when it underflows as a result of a failure
to feed the timer prior to the timer reaching its terminal count. It consists of a
programmable 12-bit prescaler, and an 8-bit down counter. The down counter is
decremented by a tap taken from the prescaler. The clock source for the prescaler is
either the PCLK or the nominal 400 kHz Watchdog oscillator. The Watchdog timer
can only be reset by a power-on reset. When the Watchdog feature is disabled, it can
be used as an interval timer and may generate an interrupt. Figure 14 shows the
Watchdog timer in Watchdog mode. Feeding the watchdog requires a two-byte
sequence. If PCLK is selected as the Watchdog clock and the CPU is powered-down,
the watchdog is disabled. The Watchdog timer has a time-out period that ranges from
a few µs to a few seconds. Please refer to the P89LPC930/931 User’s Manual for
more details.
WDL (C1H)
MOV WFEED1, #0A5H
MOV WFEED2, #05AH
Watchdog
oscillator
PCLK
÷32
8-BIT DOWN
COUNTER
PRESCALER
RESET
see note (1)
SHADOW
REGISTER
FOR WDCON
CONTROL REGISTER
WDCON (A7H)
PRE2
PRE1
PRE0
–
–
WDRUN
WDTOF
WDCLK
002aaa423
(1) Watchdog reset can also be caused by an invalid feed sequence, or by writing to WDCON not immediately followed by a
feed sequence.
Fig 14. Watchdog timer in Watchdog mode (WDTE = ‘1’).
8.23 Additional features
8.23.1
Software reset
The SRST bit in AUXR1 gives software the opportunity to reset the processor
completely, as if an external reset or Watchdog reset had occurred. Care should be
taken when writing to AUXR1 to avoid accidental software resets.
8.23.2
Dual data pointers
The dual Data Pointers (DPTR) provides two different Data Pointers to specify the
address used with certain instructions. The DPS bit in the AUXR1 register selects
one of the two Data Pointers. Bit 2 of AUXR1 is permanently wired as a logic ‘0’ so
that the DPS bit may be toggled (thereby switching Data Pointers) simply by
incrementing the AUXR1 register, without the possibility of inadvertently altering other
bits in the register.
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8.24 Flash program memory
8.24.1
General description
The P89LPC930/931 Flash memory provides in-circuit electrical erasure and
programming. The Flash can be read, erased, or written as bytes. The Sector and
Page Erase functions can erase any Flash sector (1 kB) or page (64 bytes). The Chip
Erase operation will erase the entire program memory. In-System Programming and
standard parallel programming are both available. On-chip erase and write timing
generation contribute to a user-friendly programming interface. The P89LPC930/931
Flash reliably stores memory contents even after more than 100,000 erase and
program cycles. The cell is designed to optimize the erase and programming
mechanisms. The P89LPC930/931 uses VDD as the supply voltage to perform the
Program/Erase algorithms.
8.24.2
Features
• Byte-erase allowing code memory to be used for data storage.
• Internal fixed boot ROM, containing low-level In-Application Programming (IAP)
routines.
• User programs can call these routines to perform In-Application Programming
(IAP).
• Default loader providing In-System Programming via the serial port, located in
upper end of user program memory.
• Boot vector allows user-provided Flash loader code to reside anywhere in the
Flash memory space, providing flexibility to the user.
•
•
•
•
•
•
•
8.24.3
Programming and erase over the full operating voltage range.
Programming/Erase using ISP/IAP.
Any flash program/erase operation in 2 ms.
Parallel programming with industry-standard commercial programmers.
Programmable security for the code in the Flash for each sector.
More than 100,000 minimum erase/program cycles for each byte.
10 year minimum data retention.
Using Flash as data storage
The Flash code memory array of this device supports individual byte erasing and
programming. Any byte in the code memory array may be read using the MOVC
instruction, provided that the sector containing the byte has not been secured (a
MOVC instruction is not allowed to read code memory contents of a secured sector).
Thus any byte in a non-secured sector may be used for non-volatile data storage.
8.24.4
ISP and IAP capabilities of the P89LPC930/931
Flash organization: The P89LPC930/931 program memory consists of eight 1 KB
sectors. Each sector can be further divided into 64-byte pages. In addition to sector
erase and page erase, a 64-byte page register is included which allows from 1 to 64
bytes of a given page to be programmed at the same time, substantially reducing
overall programming time. An In-Application Programming (IAP) interface is provided
to allow the end user’s application to erase and reprogram the user code memory. In
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addition, erasing and reprogramming of user-programmable bytes including UCFG1,
the Boot Status Bit, and the Boot Vector is supported. As shipped from the factory,
the upper 512 bytes of user code space contains a serial In-System Programming
(ISP) routine allowing for the device to be programmed in circuit through the serial
port.
Flash programming and erasing: There are three methods of erasing or
programming of the Flash memory that may be used. First, the Flash may be
programmed or erased in the end-user application by calling low-level routines
through a common entry point. Second, the on-chip ISP boot loader may be invoked.
This ISP boot loader will, in turn, call low-level routines through the same common
entry point that can be used by the end-user application. Third, the Flash may be
programmed or erased using the parallel method by using a commercially available
EPROM programmer which supports this device. This device does not provide for
direct verification of code memory contents. Instead this device provides a 32-bit
CRC result on either a sector or the entire 8 kbytes of user code space.
Boot ROM: When the microcontroller programs its own Flash memory, all of the low
level details are handled by code that is contained in a Boot ROM that is separate
from the Flash memory. A user program simply calls the common entry point in the
Boot ROM with appropriate parameters to accomplish the desired operation. The
Boot ROM include operations such as erase sector, erase page, program page, CRC,
program security bit, etc. The Boot ROM occupies the program memory space at the
top of the address space from FF00 to FEFF hex, thereby not conflicting with the user
program memory space.
Power-on reset code execution: The P89LPC930/931 contains two special Flash
elements: the Boot Vector and the Boot Status Bit. Following reset, the
P89LPC930/931 examines the contents of the Boot Status Bit. If the Boot Status Bit
is set to zero, power-up execution starts at location 0000H, which is the normal start
address of the user’s application code. When the Boot Status Bit is set to a value
other than zero, the contents of the Boot Vector is used as the high byte of the
execution address and the low byte is set to 00H. The factory default setting is 01EH
(0EH for the LPC930), corresponds to the address 1E00H (0E00h for the LPC930) for
the default ISP boot loader. This boot loader is pre-programmed at the factory into
this address space and can be erased by the user. Users who wish to use this
loader should take cautions to avoid erasing the 1 kbyte sector from 1C00H to
1FFFH (0C00H to 0FFFH for the LPC930). Instead, the page erase function can
be used to erase the eight (four for the LPC930) 64-byte pages located from
1C00H to 1DFFH (0C00H to 0DFFH for the LPC930). A custom boot loader can be
written with the Boot Vector set to the custom boot loader, if desired.
Hardware activation of the boot loader: The boot loader can also be executed by
forcing the device into ISP mode during a power-on sequence (see the
P89LPC930/931 User’s Manual for specific information). This has the same effect as
having a non-zero status byte. This allows an application to be built that will normally
execute user code but can be manually forced into ISP operation. If the factory default
setting for the Boot Vector (1EH for the lPC931, 0EH for the LPC930) is changed, it
will no longer point to the factory pre-programmed ISP boot loader code. If this
happens, the only way it is possible to change the contents of the Boot Vector is
through the parallel programming method, provided that the end user application
does not contain a customized loader that provides for erasing and reprogramming of
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8-bit microcontrollers with two-clock 80C51 core
the Boot Vector and Boot Status Bit. After programming the Flash, the status byte
should be programmed to zero in order to allow execution of the user’s application
code beginning at address 0000H.
In-System Programming (ISP): In-System Programming is performed without
removing the microcontroller from the system. The In-System Programming facility
consists of a series of internal hardware resources coupled with internal firmware to
facilitate remote programming of the P89LPC930/931 through the serial port. This
firmware is provided by Philips and embedded within each P89LPC930/931 device.
The Philips In-System Programming facility has made in-system programming in an
embedded application possible with a minimum of additional expense in components
and circuit board area. The ISP function uses five pins (VDD, VSS, TxD, RxD, and
RST). Only a small connector needs to be available to interface your application to an
external circuit in order to use this feature.
In-Application Programming (IAP): Several In-Application Programming (IAP) calls
are available for use by an application program to permit selective erasing, reading,
and programming of Flash sectors, pages, security bits, configuration bytes, and
device id. All calls are made through a common interface, PGM_MTP. The
programming functions are selected by setting up the microcontroller’s registers
before making a call to PGM_MTP at FF00H.
8.25 User configuration bytes
A number of user-configurable features of the P89LPC930/931 must be defined at
power-up and therefore cannot be set by the program after start of execution. These
features are configured through the use of the Flash byte UCFG1. Please see the
P89LPC930/931 User’s Manual for additional details.
8.26 User sector security bytes
There are eight User Sector Security Bytes, each corresponding to one sector.
Please see the P89LPC930/931 User’s Manual for additional details.
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9. Limiting values
Table 6:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Tamb(bias)
Min
Max
Unit
operating bias ambient temperature
−55
+125
°C
Tstg
storage temperature range
−65
+150
°C
Vxtal
voltage on XTAL1, XTAL2 pin to VSS
-
VDD + 0.5
V
Vn
voltage on any other pin to VSS
−0.5
+5.5
V
IOH(I/O)
HIGH-level output current per I/O pin
-
20
mA
IOL(I/O)
LOW-level output current per I/O pin
-
20
mA
II/O(tot)(max)
maximum total I/O current
Ptot(pack)
total power dissipation per package
[1]
[2]
[3]
Conditions
based on package heat
transfer, not device power
consumption
-
100
mA
-
1.5
W
Stresses above those listed under Table 6 “Limiting values” may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any conditions other than those described in Table 7 “DC electrical characteristics” and DC
Electrical Characteristics section of this specification are not implied.
This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive
static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise
noted.
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8-bit microcontrollers with two-clock 80C51 core
10. Static characteristics
Table 7:
DC electrical characteristics
VDD = 2.4 V to 3.6 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.
Min
Typ[1]
Max
Unit
power supply current, operating 3.6 V; 12 MHz
[2]
-
11
18
mA
IID
power supply current, Idle
mode
3.6 V; 12 MHz
[2]
-
3.25
5
mA
IPD
Power supply current,
Power-down mode, voltage
comparators powered-down
3.6 V
[2]
-
-
<t.b.d.>
µA
IPD1
Power supply current, Total
Power-down mode
3.6 V
[2]
-
1
5
µA
VDDR
VDD rise time
-
-
2
mV/µs
VDDF
VDD fall time
-
-
50
mV/µs
VPOR
Power-on reset detect voltage
-
-
0.2
V
VRAM
RAM keep-alive voltage
1.5
-
-
V
Vth(HL)
negative-going threshold
voltage (except SCL, SDA)
0.22VDD
0.4VDD
-
V
VIL1
LOW-level input voltage
(SCL, SDA only)
−0.5
-
0.3VDD
V
Vth(LH)
positive-going threshold voltage
(except SCL, SDA)
-
0.6VDD
0.7VDD
V
VIH1
HIGH-level input voltage
(SCL, SDA only)
0.7VDD
-
5.5
V
Vhys
hysteresis voltage
Port 1
-
0.2VDD
-
V
VOL
LOW-level output voltage; all
ports, all modes except Hi-Z[3]
IOL = 20 mA;
VDD = 2.4 V to 3.6 V
-
0.6
1.0
V
IOL = 3.2 mA;
VDD = 2.4 V to 3.6 V
-
0.2
0.3
V
IOH = −20 µA;
VDD = 2.4 V to 3.6 V;
quasi-bidirectional mode
VDD − 0.3
VDD − 0.2
-
V
IOH = −3.2 mA;
VDD = 2.4 V to 3.6 V;
push-pull mode
VDD − 0.7
VDD − 0.4
-
V
IOH = −20 mA;
VDD = 2.4 V to 3.6 V;
push-pull mode
<t.b.d.>
-
-
V
Symbol
IDD
VOH
Cio
IIL
ILI
Parameter
HIGH-level output voltage, all
ports
Conditions
input/output pin capacitance
[4]
-
-
15
pF
logic 0 input current, all ports
VIN = 0.4 V
[5]
-
-
−80
µA
VIN = VIL or VIH
[6]
-
-
±10
µA
VIN = 1.5 V at
VDD = 3.6 V
[7]
−30
-
−450
µA
10
-
30
kΩ
input leakage current, all ports
ITL
logic 1-to-0 transition current,
all ports
RRST
internal reset pull-up resistor
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Table 7:
DC electrical characteristics…continued
VDD = 2.4 V to 3.6 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ[1]
Max
Unit
VBO
brownout trip voltage with
BOV = ‘0’, BOPD = ‘1’
2.4 V < VDD < 3.6 V
2.40
-
2.70
V
VREF
bandgap reference voltage
1.11
1.23
1.34
V
TC(VREF)
bandgap temperature
coefficient
-
10
20
ppm/°
C
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Typical ratings are not guaranteed. The values listed are at room temperature, 3 V.
The IDD, IID, and IPD specifications are measured using an external clock with the following functions disabled: comparators, brownout
detect, and Watchdog timer.
See Table 6 “Limiting values” on page 39 for steady state (non-transient) limits on IOL or IOH. If IOL/IOH exceeds the test condition,
VOL/VOH may exceed the related specification.
Pin capacitance is characterized but not tested.
Measured with port in quasi-bidirectional mode.
Measured with port in high-impedance mode.
Port pins source a transition current when used in quasi-bidirectional mode and externally driven from ‘1’ to ‘0’. This current is highest
when VIN is approximately 2 V.
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8-bit microcontrollers with two-clock 80C51 core
11. Dynamic characteristics
Table 8:
AC characteristics
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.[1]
Symbol
Parameter
Conditions
Variable clock
fOSC = 12 MHz
Min
Max
Min
Max
Unit
fRCOSC
internal RC oscillator frequency
7.189
7.557
7.189
7.557
MHz
fWDOSC
internal Watchdog oscillator
frequency
280
480
280
480
kHz
fOSC
oscillator frequency
0
12
-
-
MHz
tCLCL
clock cycle
83
-
-
-
ns
fCLKP
CLKLP active frequency
0
4
-
-
MHz
glitch rejection, P1.5/RST pin
-
50
-
50
ns
signal acceptance, P1.5/RST pin
125
-
125
-
ns
glitch rejection, any pin except
P1.5/RST
-
15
-
15
ns
signal acceptance, any pin except
P1.5/RST
50
-
50
-
ns
see Figure 20
Glitch filter
External clock
tCHCX
HIGH time
see Figure 20
33
tCLCL − tCLCX
33
-
ns
tCLCX
LOW time
see Figure 20
33
tCLCL − tCHCX
33
-
ns
tCLCH
rise time
see Figure 20
-
8
-
8
ns
tCHCL
fall time
see Figure 20
-
8
-
8
ns
Shift register (UART mode 0)
tXLXL
serial port clock cycle time
16 tCLCL
-
1333
-
ns
tQVXH
output data set-up to clock rising
edge
13 tCLCL
-
1083
-
ns
tXHQX
output data hold after clock rising
edge
-
tCLCL + 20
-
103
ns
tXHDX
input data hold after clock rising
edge
-
0
-
0
ns
tDVXH
input data valid to clock rising edge
150
-
150
-
ns
2.0 MHz (Master)
-
-
-
-
MHz
2.0 MHz (Slave)
0
2.0
0
2.0
MHz
3.0 MHz (Master)
-
-
-
-
MHz
0
3.0
0
3.0
MHz
2.0 MHz (Master)
-
-
-
-
ns
2.0 MHz (Slave)
500
-
500
-
ns
3.0 MHz (Master)
-
-
-
-
ns
3.0 MHz (Slave)
333
-
333
-
ns
SPI interface
fSPI
Operating frequency
3.0 MHz (Slave)
tSPICYC
Cycle time
see Figures
15, 16, 17, 18
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8-bit microcontrollers with two-clock 80C51 core
Table 8:
AC characteristics…continued
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.[1]
Symbol
tSPILEAD
tSPILAG
Parameter
Variable clock
fOSC = 12 MHz
Min
Max
Min
Max
2.0 MHz
250
-
250
-
ns
3.0 MHz
240
-
240
-
ns
250
-
250
-
ns
240
-
240
-
ns
340
-
340
-
ns
190
-
190
-
ns
Master
340
-
340
-
ns
Slave
190
-
190
-
ns
Enable lead time (Slave)
Enable lag time (Slave)
Conditions
see Figures
17, 18
see Figures
17, 18
2.0 MHz
3.0 MHz
tSPICLKH
SPICLK high time
see Figures
15, 16, 17, 18
Master
Slave
tSPICLKL
SPICLK low time
Unit
see Figures
15, 16, 17, 18
tSPIDSU
Data set-up time (Master or Slave) see Figures
15, 16, 17, 18
100
-
100
-
ns
tSPIDH
Data hold time (Master or Slave)
see Figures
15, 16, 17, 18
100
-
100
-
ns
tSPIA
Access time (Slave)
see Figures
17, 18
0
120
0
120
ns
tSPIDIS
Disable time (Slave)
see Figures
17, 18
2.0 MHz
0
240
-
240
ns
3.0 MHz
0
167
-
167
ns
2.0 MHz
0
240
-
240
ns
3.0 MHz
0
167
-
167
ns
0
-
0
-
ns
SPI outputs (SPICLK, MOSI,
MISO)
-
100
-
100
ns
SPI inputs (SPICLK, MOSI,
MISO, SS)
-
2000
-
2000
ns
tSPIDV
Enable to output data valid
see Figures
15, 16, 17, 18
tSPIOH
Output data hold time
see Figures
15, 16, 17, 18
tSPIR
Rise time
see Figures
15, 16, 17, 18
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8-bit microcontrollers with two-clock 80C51 core
Table 8:
AC characteristics…continued
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.[1]
Symbol
tSPIF
[1]
[2]
Parameter
Conditions
Variable clock
fOSC = 12 MHz
Min
Max
Min
Max
SPI outputs (SPICLK, MOSI,
MISO)
-
100
-
100
ns
SPI inputs (SPICLK, MOSI,
MISO, SS)
-
2000
-
2000
ns
Fall time
Unit
see Figures
15, 16, 17, 18
Parameters are valid over operating temperature range unless otherwise specified.
Parts are tested to 2 MHz, but are guaranteed to operate down to 0 Hz.
SS
tCLCL
tSPIF
tSPICLKH
SPICLK
(CPOL = 0)
(output)
tSPIF
tSPICLKL
tSPICLKL
tSPIR
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(output)
tSPIDSU
MISO
(input)
tSPIDH
tSPIDV
MOSI
(output)
LSB/MSB in
MSB/LSB in
tSPIOH
tSPIDV
tSPIR
tSPIF
Master MSB/LSB out
Master LSB/MSB out
002aaa156
Fig 15. SPI master timing (CPHA = 0).
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8-bit microcontrollers with two-clock 80C51 core
SS
tCLCL
tSPIF
tSPICLKL
SPICLK
(CPOL = 0)
(output)
tSPIR
tSPICLKH
tSPIF
tSPICLKL
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(output)
tSPIDSU
MISO
(input)
tSPIDH
LSB/MSB in
MSB/LSB in
tSPIDV
MOSI
(output)
tSPIDV
tSPIOH
tSPIDV
tSPIR
tSPIF
Master MSB/LSB out
Master LSB/MSB out
002aaa157
Fig 16. SPI master timing (CPHA = 1).
SS
tSPIR
tSPILEAD
tSPIF
tSPICLKH
SPICLK
(CPOL = 0)
(input)
tSPIF
tSPIR
tCLCL
tSPICLKL
tSPICLKL
tSPIR
tSPILAG
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(input)
tSPIOH
tSPIA
MISO
(output)
tSPIDIS
tSPIDV
Slave MSB/LSB out
tSPIDSU
MOSI
(input)
tSPIOH
tSPIOH
tSPIDV
tSPIDH
Slave LSB/MSB out
tSPIDSU
tSPIDSU
MSB/LSB in
Not defined
tSPIDH
LSB/MSB in
002aaa158
Fig 17. SPI slave timing (CPHA = 0).
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8-bit microcontrollers with two-clock 80C51 core
SS
tSPIR
tSPILEAD
tSPIF
tSPICLKH
SPICLK
(CPOL = 0)
(input)
tSPIR
tCLCL
tSPIF
tSPICLKL
tSPICLKL
tSPIR
tSPILAG
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(input)
tSPIOH
tSPIOH
tSPIDV
tSPIOH
tSPIDV
tSPIDIS
tSPIDV
tSPIA
MISO
(output)
Not defined
Slave LSB/MSB out
Slave MSB/LSB out
tSPIDSU
MOSI
(input)
tSPIDH
tSPIDSU
tSPIDSU
MSB/LSB in
tSPIDH
LSB/MSB in
002aaa159
Fig 18. SPI slave timing (CPHA = 1).
tXLXL
Clock
tXHQX
tQVXH
Output Data
0
Write to SBUF
Input Data
1
2
3
4
5
6
7
tXHDX
tXHDV
Set TI
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Clear RI
Set RI
002aaa425
Fig 19. Shift register mode timing.
VDD - 0.5 V
0.45 V
0.2 VDD + 0.9
0.2 VDD - 0.1 V
tCHCX
tCHCL
tCLCX
tCLCH
tC
002aaa416
Fig 20. External clock timing.
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Table 9:
AC characteristics, ISP entry mode
VDD = 2.4 V to 3.6 V, unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tVR
RST delay from VDD active
50
-
-
µs
tRH
RST HIGH time
1
-
32
µs
tRL
RST LOW time
1
-
-
µs
VDD
tVR
tRH
RST
002aaa426
tRL
Fig 21. ISP entry waveform.
12. Comparator electrical characteristics
Table 10: Comparator electrical characteristics
VDD = 2.4 V to 3.6 V, unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.
Symbol
Parameter
VIO
offset voltage comparator inputs
VCR
common mode range comparator inputs
CMRR
[1]
Min
Typ
Max
Unit
-
-
±20
mV
0
-
VDD − 0.3
V
-
-
−50
dB
response time
-
250
500
ns
comparator enable to output valid
-
-
10
µs
-
-
±10
µA
[1]
common mode rejection ratio
input leakage current, comparator
IIL
Conditions
0 < VIN < VDD
This parameter is characterized, but not tested in production.
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13. Package outline
TSSOP28: plastic thin shrink small outline package; 28 leads; body width 4.4 mm
D
SOT361-1
E
A
X
c
HE
y
v M A
Z
15
28
Q
A2
(A 3)
A1
pin 1 index
A
θ
Lp
1
L
14
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
9.8
9.6
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.8
0.5
8
0o
o
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT361-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
MO-153
Fig 22. SOT361-1.
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14. Soldering
14.1 Introduction to soldering surface mount packages
This text gives a very brief insight to a complex technology. A more in-depth account
of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit
Packages (document order number 9398 652 90011).
There is no soldering method that is ideal for all IC packages. Wave soldering can still
be used for certain surface mount ICs, but it is not suitable for fine pitch SMDs. In
these situations reflow soldering is recommended. In these situations reflow
soldering is recommended.
14.2 Reflow soldering
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and
binding agent) to be applied to the printed-circuit board by screen printing, stencilling
or pressure-syringe dispensing before package placement. Driven by legislation and
environmental forces the worldwide use of lead-free solder pastes is increasing.
Several methods exist for reflowing; for example, convection or convection/infrared
heating in a conveyor type oven. Throughput times (preheating, soldering and
cooling) vary between 100 and 200 seconds depending on heating method.
Typical reflow peak temperatures range from 215 to 270 °C depending on solder
paste material. The top-surface temperature of the packages should preferably be
kept:
• below 220 °C (SnPb process) or below 245 °C (Pb-free process)
– for all BGA and SSOP-T packages
– for packages with a thickness ≥ 2.5 mm
– for packages with a thickness < 2.5 mm and a volume ≥ 350 mm3 so called
thick/large packages.
• below 235 °C (SnPb process) or below 260 °C (Pb-free process) for packages with
a thickness < 2.5 mm and a volume < 350 mm3 so called small/thin packages.
Moisture sensitivity precautions, as indicated on packing, must be respected at all
times.
14.3 Wave soldering
Conventional single wave soldering is not recommended for surface mount devices
(SMDs) or printed-circuit boards with a high component density, as solder bridging
and non-wetting can present major problems.
To overcome these problems the double-wave soldering method was specifically
developed.
If wave soldering is used the following conditions must be observed for optimal
results:
• Use a double-wave soldering method comprising a turbulent wave with high
upward pressure followed by a smooth laminar wave.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
49 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be
parallel to the transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the
transport direction of the printed-circuit board.
The footprint must incorporate solder thieves at the downstream end.
• For packages with leads on four sides, the footprint must be placed at a 45° angle
to the transport direction of the printed-circuit board. The footprint must
incorporate solder thieves downstream and at the side corners.
During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.
Typical dwell time of the leads in the wave ranges from 3 to 4 seconds at 250 °C or
265 °C, depending on solder material applied, SnPb or Pb-free respectively.
A mildly-activated flux will eliminate the need for removal of corrosive residues in
most applications.
14.4 Manual soldering
Fix the component by first soldering two diagonally-opposite end leads. Use a low
voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time
must be limited to 10 seconds at up to 300 °C.
When using a dedicated tool, all other leads can be soldered in one operation within
2 to 5 seconds between 270 and 320 °C.
14.5 Package related soldering information
Table 11:
Suitability of surface mount IC packages for wave and reflow soldering
methods
Package[1]
Soldering method
Wave
Reflow[2]
BGA, LBGA, LFBGA, SQFP, SSOP-T[3],
TFBGA, VFBGA
not suitable
suitable
DHVQFN, HBCC, HBGA, HLQFP, HSQFP,
HSOP, HTQFP, HTSSOP, HVQFN, HVSON,
SMS
not suitable[4]
suitable
PLCC[5], SO, SOJ
suitable
suitable
suitable
LQFP, QFP, TQFP
not
SSOP, TSSOP, VSO, VSSOP
not recommended[7]
suitable
PMFP[8]
not suitable
not suitable
[1]
[2]
For more detailed information on the BGA packages refer to the (LF)BGA Application Note
(AN01026); order a copy from your Philips Semiconductors sales office.
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal
or external package cracks may occur due to vaporization of the moisture in them (the so called
popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated
Circuit Packages; Section: Packing Methods.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
recommended[5][6]
Rev. 03 — 06 October 2003
50 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
[3]
[4]
[5]
[6]
[7]
[8]
These transparent plastic packages are extremely sensitive to reflow soldering conditions and must
on no account be processed through more than one soldering cycle or subjected to infrared reflow
soldering with peak temperature exceeding 217 °C ± 10 °C measured in the atmosphere of the reflow
oven. The package body peak temperature must be kept as low as possible.
These packages are not suitable for wave soldering. On versions with the heatsink on the bottom
side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with
the heatsink on the top side, the solder might be deposited on the heatsink surface.
If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave
direction. The package footprint must incorporate solder thieves downstream and at the side corners.
Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it
is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
Wave soldering is suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than
0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
Hot bar soldering or manual soldering is suitable for PMFP packages.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
51 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
15. Revision history
Table 12:
Revision history
Rev Date
03
20031006
CPCN
Description
-
Product data (9397 750 12122); ECN 853-2406 30390 dated 30 September 2003.
Modifications:
•
Figure 5 “Interrupt sources, interrupt enables, and power-down wake-up sources.” on
page 20: adjusted drawing.
•
•
•
Section 8.14 “Reset” on page 23: added new paragraph.
Section 8.20 “Analog comparators” on page 33: added new paragraph.
Table 7 “DC electrical characteristics” on page 40: added VPOR spec.
02
20030526
-
Objective data (9397 750 11536)
01
20030514
-
Preliminary data (9397 750 11386)
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Product data
Rev. 03 — 06 October 2003
52 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
16. Data sheet status
Level
Data sheet status[1]
Product status[2][3]
Definition
I
Objective data
Development
This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1]
Please consult the most recently issued data sheet before initiating or completing a design.
[2]
The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.
[3]
For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
17. Definitions
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Short-form specification — The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Right to make changes — Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
performance. When the product is in full production (status ‘Production’),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
licence or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.
Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.
Application information — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
18. Disclaimers
19. Licenses
Purchase of Philips I2C components
Life support — These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors
Purchase of Philips I2C components conveys a license
under the Philips’ I2C patent to use the components in the
I2C system provided the system conforms to the I2C
specification defined by Philips. This specification can be
ordered using the code 9398 393 40011.
Contact information
For additional information, please visit http://www.semiconductors.philips.com.
For sales office addresses, send e-mail to: [email protected].
Product data
Fax: +31 40 27 24825
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 12122
Rev. 03 — 06 October 2003
53 of 54
P89LPC930/931
Philips Semiconductors
8-bit microcontrollers with two-clock 80C51 core
Contents
1
2
3
3.1
4
5
5.1
5.2
6
7
8
8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.10.1
8.11
8.11.1
8.11.2
8.11.3
8.11.4
8.11.5
8.11.6
8.11.7
8.12
8.12.1
8.12.2
8.13
8.13.1
8.13.2
8.13.3
8.14
8.14.1
8.15
8.15.1
8.15.2
8.15.3
8.15.4
8.15.5
8.15.6
8.16
8.17
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pinning information. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Logic symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Special function registers. . . . . . . . . . . . . . . . . . . . . 11
Functional description . . . . . . . . . . . . . . . . . . . . . . . 16
Enhanced CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Clock definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CPU clock (OSCCLK) . . . . . . . . . . . . . . . . . . . . . . . 16
Low speed oscillator option . . . . . . . . . . . . . . . . . . . 16
Medium speed oscillator option . . . . . . . . . . . . . . . . 16
High speed oscillator option . . . . . . . . . . . . . . . . . . . 16
Clock output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
On-chip RC oscillator option . . . . . . . . . . . . . . . . . . 17
Watchdog oscillator option . . . . . . . . . . . . . . . . . . . . 17
External clock input option . . . . . . . . . . . . . . . . . . . . 17
CPU CLock (CCLK) wake-up delay . . . . . . . . . . . . . 18
CPU CLOCK (CCLK) modification: DIVM register . . 18
Low power select . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Memory organization . . . . . . . . . . . . . . . . . . . . . . . . 18
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
External interrupt inputs . . . . . . . . . . . . . . . . . . . . . . 19
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Port configurations . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Quasi-bidirectional output configuration. . . . . . . . . . 21
Open-drain output configuration. . . . . . . . . . . . . . . . 21
Input-only configuration . . . . . . . . . . . . . . . . . . . . . . 21
Push-pull output configuration . . . . . . . . . . . . . . . . . 21
Port 0 analog functions . . . . . . . . . . . . . . . . . . . . . . 21
Additional port features . . . . . . . . . . . . . . . . . . . . . . 22
Power monitoring functions . . . . . . . . . . . . . . . . . . . 22
Brownout detection . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power-on detection . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power reduction modes . . . . . . . . . . . . . . . . . . . . . . 23
Idle mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power-down mode . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Total Power-down mode . . . . . . . . . . . . . . . . . . . . . . 23
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Reset vector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Timers/counters 0 and 1 . . . . . . . . . . . . . . . . . . . . . 24
Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mode 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Timer overflow toggle output . . . . . . . . . . . . . . . . . . 25
Real-Time clock/system timer . . . . . . . . . . . . . . . . . 25
UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
© Koninklijke Philips Electronics N.V. 2003.
Printed in the U.S.A.
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice. No
liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
Date of release: 06 October 2003
Document order number: 9397 750 12122
8.17.1
8.17.2
8.17.3
8.17.4
8.17.5
8.17.6
8.17.7
8.17.8
8.17.9
Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Baud rate generator and selection . . . . . . . . . . . . . . 26
Framing error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Break detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Double buffering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Transmit interrupts with double buffering
enabled (Modes 1, 2 and 3) . . . . . . . . . . . . . . . . . . . 27
8.17.10
The 9th bit (bit 8) in double buffering (Modes 1, 2 and
3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.18
I2C-bus serial interface . . . . . . . . . . . . . . . . . . . . . . . 28
8.19
Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . 29
8.19.1
Typical SPI configurations. . . . . . . . . . . . . . . . . . . . . 31
8.20
Analog comparators . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.20.1
Internal reference voltage . . . . . . . . . . . . . . . . . . . . . 33
8.20.2
Comparator interrupt. . . . . . . . . . . . . . . . . . . . . . . . . 34
8.20.3
Comparators and power reduction modes . . . . . . . . 34
8.21
Keypad interrupt (KBI) . . . . . . . . . . . . . . . . . . . . . . . 34
8.22
Watchdog timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.23
Additional features . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.23.1
Software reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.23.2
Dual data pointers. . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.24
Flash program memory. . . . . . . . . . . . . . . . . . . . . . . 36
8.24.1
General description. . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.24.2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.24.3
Using Flash as data storage . . . . . . . . . . . . . . . . . . . 36
8.24.4
ISP and IAP capabilities of the P89LPC930/931 . . . 36
8.25
User configuration bytes . . . . . . . . . . . . . . . . . . . . . . 38
8.26
User sector security bytes . . . . . . . . . . . . . . . . . . . . 38
9
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10
Static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 40
11
Dynamic characteristics . . . . . . . . . . . . . . . . . . . . . . 42
12
Comparator electrical characteristics . . . . . . . . . . . 47
13
Package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
14
Soldering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
14.1
Introduction to soldering surface mount packages . . 49
14.2
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
14.3
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
14.4
Manual soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.5
Package related soldering information . . . . . . . . . . . 50
15
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
16
Data sheet status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
17
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
18
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
19
Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53